53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
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#
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# Permission to use, copy, modify, and distribute this software and its
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# documentation for any purpose with or without fee is hereby granted,
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# provided that the above copyright notice and this permission notice
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# appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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import dns.exception
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import dns.ipv4
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import dns.rdata
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import dns.tokenizer
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class A(dns.rdata.Rdata):
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"""A record.
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@ivar address: an IPv4 address
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@type address: string (in the standard "dotted quad" format)"""
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__slots__ = ['address']
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def __init__(self, rdclass, rdtype, address):
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super(A, self).__init__(rdclass, rdtype)
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# check that it's OK
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dns.ipv4.inet_aton(address)
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self.address = address
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def to_text(self, origin=None, relativize=True, **kw):
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return self.address
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@classmethod
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def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
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address = tok.get_identifier()
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tok.get_eol()
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return cls(rdclass, rdtype, address)
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def to_wire(self, file, compress=None, origin=None):
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file.write(dns.ipv4.inet_aton(self.address))
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@classmethod
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def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
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address = dns.ipv4.inet_ntoa(wire[current: current + rdlen])
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return cls(rdclass, rdtype, address)
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